Ontology highlight
ABSTRACT:
SUBMITTER: Chi Fru E
PROVIDER: S-EPMC4983842 | biostudies-other | 2016 May
REPOSITORIES: biostudies-other
Chi Fru Ernest E Rodríguez Nathalie P NP Partin Camille A CA Lalonde Stefan V SV Andersson Per P Weiss Dominik J DJ El Albani Abderrazak A Rodushkin Ilia I Konhauser Kurt O KO
Proceedings of the National Academy of Sciences of the United States of America 20160418 18
The oxygenation of the atmosphere ∼2.45-2.32 billion years ago (Ga) is one of the most significant geological events to have affected Earth's redox history. Our understanding of the timing and processes surrounding this key transition is largely dependent on the development of redox-sensitive proxies, many of which remain unexplored. Here we report a shift from negative to positive copper isotopic compositions (δ(65)CuERM-AE633) in organic carbon-rich shales spanning the period 2.66-2.08 Ga. We ...[more]